/*
Copyright (c) 2009-2010, Warwick Warp Limited
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the Warwick Warp Limited nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL WARWICK WARP LIMITED BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef WARRAY_WARRAY_DFT_H_INCLUDED
#define WARRAY_WARRAY_DFT_H_INCLUDED

#include <complex>
#include "warray_types.h"
#include "warray_nd.h"

#include "detail/warray_naive_dft.h"
#include "detail/warray_dif_fft.h"

namespace warp {

namespace dft {
	
enum direction_e 
{
	FORWARD,
	BACKWARD
};

enum scramble_e
{
	UNSCRAMBLED,
	SCRAMBLED
};

/*
template<typename T, detail::warray_types::size_type N>
class real_complex 
{
	public:
		
	typedef T domain_type;
	typedef std::complex<T> range_type;

	real_complex(const array_extents<N>& dims, direction_e dir, scramble_e scramble);

	const array_extents<N>& domain_dims() const;
	const array_extents<N>& range_dims() const;

	T operator()(const const_arraynd<domain_type,N>& s, const arraynd<range_type,N>& f);

	const_arraynd<array_indices<N>,N> decode_map();

	private:

	direction_e m_direction;

	scramble_e m_scramble;

	detail::dif_fft_nd_implementor<T, N> m_fft;
};

template<typename T, detail::warray_types::size_type N>
class complex_complex 
{
public:
		
	typedef std::complex<T> domain_type;
	typedef std::complex<T> range_type;

	complex_complex(const array_extents<N>& dims, direction_e dir, scramble_e scramble) :
		m_fft(dims, dir, scramble) { }

	const array_extents<N>& domain_dims() const;
	const array_extents<N>& range_dims() const;

	T operator()(const const_arraynd<domain_type,N>& s, const arraynd<range_type,N>& f)
	{
		m_fft(s, f);
	}

private:

	detail::dif_fft_nd_implementor<T, N> m_fft;
};

*/

} // namespace dft

} // namespace warp

#endif

